John c



(No Model.)

J. C. YBTTER. SAFETY PAPER.

No. 595,281. Patentedne. 7,1897.

llllll E IINiTnD STATES PATENT OFFICE.

JOI'IN C. YETTER, OF CHICAGO, ILLINOIS, ASSIGNOR OF TVO-TIIIRDS TO .ED'YVARD R. COOPER AND CIIARLES F. SLAUGIITER, OE SAME PLACE.

SAFETY-PAPER.

SPECIFICATION forming part of Letters Patent No. 595,281, dated December 7, 1897. Application filed April 24, 1897. Serial No. 633,667. (No model.)

To aZZ whom iz? 71mg/ concern.-

Be it known that I, JOHN C. YETTER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvementsin Safety-Paper; and I do hereby declare the following to be a full, clear, and exact description of the invention., such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a novel safety-paper, the object being to provide a paper of this character adapted to be used for checks, tickets, and other monetary instruments which are liable to be tampered with; and it consists in the manner of preparing the sam e, hereinafter fully described and claimed.

In the accompanying drawing I have illustrated various ways in which a safety-paper can be prepared in accordance with my invention.

One feature of my invention consists in printing or otherwise impressing upon paper a plurality of sets of lines or marks, of which one or more sets are indelible and the remaining sets deleble.

Another feature of my invention consists in making said lines or marks so fine and so closely alternating or relatively disposing them that in ordinary observation with the naked eye no single line or mark will be distinguishable.

Another feature of my invention consists in making the indelible lines or marks of a color differing from but preferably complementary to the color of the deleble lines or marks, so that owing to their close juxtaposition they will convey the impression of a color diering from the colors of either of the sets of lines or marks.

Another feature of my invention consists in leaving a space between each two deleble and indelible lines or marks of no greater width or area than said lines or marks.

In the accompanying drawing, as before stated, I have shown, on an enlarged scale, different ways of preparing a safety-paper in accordance with my invention, and in said drawing the indelible lines or marks, the latter of which may be of .any desired form, are indicated by black lines, while the deleble lines or marks are shown of a lighter shade and alternate with or cross said indelible lines or marks. It will of course be understood that said lines or marks can be relatively arranged in an unlimited number of ways, and I have therefore shown only a few examples thereof, though I wish it to be understood that any arrangement by which the lines or marks are in any manner alternated or crossed over each other comes within the scope of my invention, provided a space is left between the lines or marks and alternated therewith, or that the lines or marks are microscopically Iine and of different colors, so as to convey to the eye the impression of a color differing from the colors of any of said lines.

I am aware that it has been attempted to make a safety-paper by alternating groups of deleble and indelible lines or marks, and I am also aware that it is well known in the art of carpet and tapestry weaving that by placing threads of different and complementary colors side by side or intermingling the same an impression of a color differing from the colors of either of such threads is conveyed to the eye. This, however, has never to my knowledge been attempted to be applied to a safetypaper, and for this reason I believe my invention to be new in its most essential featureswnamely, to make the deleble and indelible lines or marks of different and complementary colors, so closely alternate or intermingle the same as to convey the impression to the eye of a color differing from the colors of either of said lines or marks, and to leave between or intermingle with said lines or marks in practically the same relation thereto as the relation to each other of said lines or marks a space not covered by any impression.

The last-named feature is of the utmost importance, for the reason that were no space left between the lines or marks of different colors the deleble lines or marks could be completely erased and then replaced with a transparent ink from a flat plate,so as to cover the indelible lines or marks, and owing to the transparency of the ink the latter would not affect or hide the indelible lines. For example, if a safetypaper were produced by print- IOO ing indelible red lines alternated with deleble green lines, leaving no space between each red and green line, the deleble green lines could be erased and then replaced by printing over the entire surface of the paper, so as to cover the red lines with a transparent green ink. The latter, though covering the red lines, would not hide nor change the shade of the same, and therefore an alteration could not be detected. l/Vhere a White space is left between each red and green line, the latter to be replaced would have to register with the red lines again, so as to leave such white space between it and said red line.- Owing to the exceeding iineness of the lines this would be utterly impossible.

I prefer to make the lines or marks impressed upon the paper microscopically finethat is, so iine that the naked eye cannot by the closest inspection distinguish the different colors employed.

I claim as my inventionl. A safety-paper having lines or marks printed or otherwise impressed thereon, said lines or marks being microscopically fine and divided into sets of different colors, and so closely relatively disposed as to alternate said colors and bring them into such close juxtaposition as to convey to the eye the impression of a color differing from the colors of any of said sets of lines or marks, substantially as described.

2. A safety-paper having sets of lines or marks of different colors printed or otherwise impressed thereon, said lines or marks being microscopically iine and so closely relatively disposed as to alternate said colors and bring them into such close relative juxtaposition as to convey to the eye the impression of a color differing from the colors of either of said sets of lines or marks, and a space between each two of said lines or marks, substantially as described.

3. A safety-paper having sets of lines or marks of different colors printed or otherwise impressed thereon, said sets of lines of different colors being respectively deleble and indelible and microscopically fine, and so closely relativelydisposed as to alternate said colors and bring them into such close relative juxtaposition as to convey to the eye the impression of a color differing from the colors of either of said sets of lines or marks, and a space adjacent each of said lines or marks, substantially as described.

4. A safety-paper having sets of parallel lines of different colors printed or otherwise impressed thereon, said lines being microscopically iine and alternated in such a manner as to bring said different colors into such close juxtaposition as to convey to the eye the impression of a color differing from the colors of either of said sets of lines, substantially as described.

5. A safety-paper having sets of parallel lines, of different colors printed or otherwise impressed thereon, said lines of different colors being microscopically tine and alternated so as to bring one line of one color between two lines of a color or colors differing therefrom, whereby the impression of a color differing from the colors of either of said sets of lines or marks is conveyed to the eye, and a space between each two of said lines, substantially as described.

6. A safety-paper having sets of parallel lines of different colors printed or otherwise impressed thereon, said lines of different colors being microscopically fine and alternated so as to bring one lineof one color between two lines of a color or colors differing therefrom, whereby the impression of a color differing from the colors of either of said sets of lines or marks is conveyed to the eye, and a space of a width not greater than said lines between each two thereof, substantially as described.

7. A safety-paper having sets of parallel lines of different colors printed or otherwise impressed thereon, said sets of lines of different colors being respectively deleble and indelible and microscopically iine, said lines being alternated in such a manner as to bring one line of one color between two of another color or colors, and a space alternated with 93 said lines, whereby an impression of a color differing from the colors of either of said sets of lines or marks is conveyed to the eye, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN c. YETTER.

Vitnesses:

RUDOLPH WM. Lorz, ERwIN J. LoTZ.

IOO 

